Gaseous fuel supply system and abnormality detection method for gaseous fuel supply system

摘要

A gas fuel supply system (15) supplies gas fuel into the combustion chamber (7) of an engine. The gas fuel supply system is provided with: an injection valve (8) for injecting the gas fuel into the combustion chamber; a supply flow passage through which the gas fuel to be supplied to the injection valve flows; a gate valve which can open and close the supply flow passage; a pressure sensor for detecting pressure in the portion of the supply flow passage, which is located between the injection valve and the gate valve; and a control device for controlling the injection valve and the gate valve. The abnormality of the injection valve and/or the gate valve is detected on the basis of the result of detection by the pressure sensor and on the basis of the result of detection by a detection device for detecting the crank angle of the crankshaft of the engine.